Dinosaurs are the extinct relatives of birds that roamed the lands and seas of ancient Earth. They first appeared around 240 ...

This is a reconstruction of the prehistoric mammal Spinolestes in the Cretaceous-period Las Hoyas wetland. This image is not associated with the current study but demonstrates a dark-furred mammal ...

The passenger pigeon was once the most numerous bird in the world. In the mid-1800s, billions of these birds were flying over the forests of eastern North America. Yet in just half a century, they’d ...

In June 1844, farmers Jón Brandsson and Sigurður Ísleifsson, along with 12 others, made the perilous journey by boat from Iceland to the island of Eldey. They were searching for great auks ...